Even as the shortest raid in the game, Onyxia had a long hallway with trash capable of wiping you. Gruul's had an antechamber with trash capable of wiping you. Almost all FF14 raids are even shorter than these, and the few that are the same length as Onyxia have just been nominated in this thread for trimming to remove the exact parts that make it feel like you're breaking into an enemy facility rather than stepping off a tour bus.
